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Finding the Fourth Proportional to 2,099.93, 3,150.33 and 639.04

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Solution

The fourth proportional to 2,099.93, 3,150.33 and 639.04 is: 958.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,099.93 : 3,150.33 = 639.04 : x
  2. Step 2: Convert to fraction form
    2,099.93/3,150.33 = 639.04/x
  3. Step 3: Cross multiply
    2,099.93x = 3,150.33 × 639.04
  4. Step 4: Simplify right side
    2,099.93x = 2,013,187.91
  5. Step 5: Solve for x
    x = 2,013,187.91/2,099.93
  6. Step 6: Final answer
    x = 958.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.